Question

Each edge of a cube is increased by 75% then the percentage increased in the
surface area?

Answer 1

Answer:

If Say the edge of the cube is 10, its surface area is 6*100; After 20% increase the edge becomes 12, so the new surface area is 6*144; Percent increase=change/original=(6*144-6*100)/(6*100)*100=44%.

Answer 2

Answer:

56.25%

whole solution is in the attachment

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